Q150 / 160 · TS EAMCET 2020 (14 Sep Shift 1) · Physics

A particle of mass $m$ and charge $Q$ moving with a speed $v$ in a circular path of radius $R$ has magnetic moment $\mu$. If the mass of the particle is doubled and maintains the same speed while revolving in the same circular path, then the magnetic moment will be

  • A
    doubled
  • B
    halved
  • C
    tripled
  • Correct answer
    D
    unchanged

Solution

Magnetic moment associated with moving charge on circular path is given as, $\mu=\frac{Q v R}{2} \Rightarrow \mu \propto Q v R$ Clearly $\mu$ doesn't depend on mass of charged particle and also if $v=$ unchanged then $\mu=$ uncharged.

Hence, the correct answer is option: 'D'.

Relevant Questions